VERDER PACKO ZL Series Operation & Maintenance Manual page 12

(Due to the pressure limitation, the ZL440 - ZL450 has only one spring type up to 10 bar, here are other options.)
How it works:
The spring marked in red exerts pressure on the pump cover. The further this spring is compressed with the
hex screw, which is also marked in red, the higher the pressure on the pump casing cover.
Example ZL110: If the screw is screwed in so far that the marked distance between the hex nut and the hex
screw corresponds to 58 mm, the valve is opened at 2.5 bar.
ZL110
0 bar ~ 10 bar: low pressure
2,5 bar : 58 mm, 3 bar : 57 mm, 4 bar : 52 mm, 5 bar : 48 mm, 8 bar : 45 mm, 10 bar : 43 mm
12 bar ~ 20 bar: high pressure
12 bar: 51 mm, 14 - 15 bar: 50 mm, 16 bar: 49,5 mm, 18 bar: 49 mm, 20 bar: 48 mm
ZL115 AND ZL120
0 bar ~ 7 bar: low pressure
2 bar: 55 mm, 2,5 bar: 54mm, 4,5 bar: 50mm, 6 bar: 45,5 mm
8 bar ~ 12 bar: high pressure
7,5 bar: 52 mm, 8 bar: 51,5 mm, 10 bar: 50mm, 12 bar: 48,5 mm
ZL220 & ZL225
0 bar ~ 7 bar: low pressure
3,5 bar: 47 mm, 7 bar: 39 mm
8 bar ~ 12 bar: high pressure
8 bar: 48 mm, 10 bar: 46mm, 12 bar: 44 mm
ZL330 & ZL340
0 bar ~ 5 bar: low pressure
5 bar: 46,5 mm
6 bar ~ 12 bar: high pressure
8 bar: 54 mm, 10 bar: 51mm, 12 bar: 47 mm
ZL440 UND ZL450
0 bar ~ 10 bar: only one spring type
3 bar : 58 mm, 5 bar : 54 mm, 7 bar : 53 mm, 8 bar : 51,5 mm, 9 bar : 50,5 mm, 10 bar : 48,5 mm
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